You are walking while carrying groceries on the side of the road & immediately stopped when you see a light at the end of a dark alley. You enter the light with curious & suddenly dropped in that place you don't recognize. When you turn around, the light disappears in an instant before you return to your era. You are trapped & keep running aimlessly in the middle of a dark forest until you crash into Rin. He who had just entered the mysterious light & was trapped like you shocked & flinched.